Door-lock.



s. e. GERLACH.

[500R LOCK.

APPLICATION FILED DEC. I3. 1916 1 36,287. Patented Aug. 7, 1917.

STEPHAN G. GERLACI-I, OF STRATFORD, CONNECTICUT.

DOOR-LOCK.

Application filed December 13, 1916.

To all whom it may concern:

Be it known that I, STEPHAN G. GERLAOH, a citizen of the United States, residing at Stratford, in the county of Fairfield and State of Connecticut, have invented new and useful Improvements in Door-Locks, of

I which the following is a specification.

-The present invention relates to improvements in door locks, and the primary object of the invention is to produce a lock having means associated therewith whereby to sound an alarm when the knob spindle has been operated after the device has been set to insure the door upon which the lock is arranged against surreptitious opening.

It is a further object of the invention to produce a lock for doors having a chamber or barrel thereon adapted to receive a'blank cartridge and to provide the said lock with v 1 spindle.

a spring pressed hammer inthe path of contact with the cartridge but normally sustained away from such contact and adapted to be actuated by the turning of the knob It is a still further object of the invention to produce a lock for doors having a barrel or chamber designed to receive a blank cartridge that is adapted to be contacted by a sprlng pressed pin or hammer when the knob spindle has been actuated by unauthorized persons, and wherein the cartridge can be readily guided to the chamber therefor, the pin or hammer positively retained against accidental actuation and being positively guided in its movement and also wherein the knob or handle member for the pin or hammer provides an additional means for retaining the face plate upon the lock casing.

It is a still further object of the invention to produce a device of this character which shall embody thedesirable features of simplicity, cheapness and efficiency in operation.

With the above and other objects in view the improvement resides in the construction, combination and'arrangement of parts set forth in the following specification and falling within the scope of the appended claims. In the drawings:

Figure 1 is a side elevation of a lock constructedin accordance with the present invention,

Specification of Letters Patent.

maybe obtained. The casing has arranged therein the usual slidable locking bolt and spring actuated latching bolt, and the spindle tumbler for the latch bolt is indicated by the numeral 3. This tumbler may be of the ordinary construction but is provided upon the outer. surface of its barrel with a lug or detent 4:. The detent 4 is adapted toengage with the rounded edge of a rocker plate 5, the said plate being provided with spaced openings 6 and 7 receiving a fulcrum lug 8 and a guidelug 9 respectively, whereby when the said plate is rocked by the turning of the knob spindle the plate will be guided by the guide lug and swung upon the. fulcrum lug. The rocker plate 5 has what I will term its inner edge formed with a nose 9 that is adapted to be engaged with the rounded portion or nose 10 upon a dog 11,.the said dog being pivotally secured, as at 12, to the lock casing and the dog as wellas the rocking plate 5 are infiuenced by a spring 13 suitablyarranged between lugs upon the lock casing whereby the head 14: of the said dog is normally moved to one direction.

Upon the face plate of the lock casing l at a suitable distance forward of the dog 10 there is arrangeda thickened portion or enlargement 15 having a rounded opening 16 therein, and this opening provides an explosive chamber for a blank cartridge 17. To the rear of the explosive chamber 16, but in a line therewith are spaced lugs 18-18 having registering openings and re ceiving the hammer member or pin 19 of the device. The pin 19 is provided with a trans verse lug 20, and surrounding the said pin and exerting a pressure between the lug 20 and the inner lug 18 is a pressure spring 21, and the function of this spring is to normally move the pin 19 longitudinally to iso cause the end thereof to be moved in the direction of the explosive chamber 16, to explode the cartridge 17 when a cartridge is arranged Within the said chamber.

The numeral 22 designates a substantially rectangular member which is secured in any desired or preferred manner to the pin and which is adapted to be engaged by the head 14 of the dog 10 to normally retain the pin 19 out of contacting engagement with the cartridge in the explosive chamber. The member 22 has its edge disposed adjacent the rounded outer end of the head 14 of the dog 10 beveled, as at 28, whereby the said member may be readily moved over the said rounded portion of the head of the dog when the pin is in its retracted position, or when the same is retained by the dog out of cartridgeengaging position. The member 22 is of a greater width than the thickness of the lock casing and projects through a suitable opening in the cover plate 2 of the said casing, and this opening is surrounded by a flanged wall 2%. The wall provides a passage between the plate 2 and the cartridge or explosive chamber 16, so that the cartridge may be grasped by a pair of pincers and directed by the flanges through the opening in the cover plate to effect in insuring the proper arrangement of the said cartridge within the opening 16. In addition the flanged wall contacting with the sides of the member 22 serves as a guide for the pin 19. The outer end of the member 22 is arranged flush with the outer edge of the flanged wall 24, and is provided with an opening which is threaded, and if desired the said opening may communicate with the pin 19, which is especially desirable when the member 22 is not integrally formed with the pin, and passing through the referred to opening and contacting with the pin 19 is the threaded shank 25 of a headed member or knob 26, and the inner edge of this knob rests upon the outer edge of the wall 2 f.

By an arrangement as above described it will be noted that the cartridge through the medium of the tweezers or similar holding device may be arranged in a position to be contacted by the pin or may be removed from the opening or chamber 16 when desired, and it will be further noted that when the knob spindle is turned by unauthorized persons the cartridge will be positively eX- ploded sounding an alarm to indicate to the occupants of the house that the door has been surreptitiously opened.

The cartridges may be removed from the explosive chamber by the pincers which are employed for arranging the same therein before or after the explosion of the said cartridges, and so it will be noted that after the device has been set for the night, the owner or occupant of the apartment upon which the lock is arranged may remove the cartridge before turning the knob and spin dle to open the door, when the alarm is not immediately required.

Having thus described the invention, what I claim is:

1, A lock of the class described having a cartridge-receiving chamber, a spring pressed pin arranged adjacent to said chamber and designed to contact with a cartridge when the same is deposited in the chamber, a member arranged angularly upon the pin, a pivoted dog for engaging said member to hold the pin out of cartridge contacting posi tion, a pivot rocker plate .co-acting with the dog, a spring member engaging with both the dog and rocker plate for retaining the same in contacting relation, and a turnable member having a lug engaging with one of the edges of said rocker plate and designed to actuate said plate to cause the same to swing the dog out of engagement with the referred to member on the pin.

2. A lock for the purpose set forth having its face plate enlarged and provided with an opening forming a cartridge receiving chamber, a spring pressed pin arranged adjacent to said chamber and designed to contact with the cartridge to explode the same when a cartridge is arranged within said chamber, a member arranged angularly upon the pin and having one ofits edges beveled, a pivoted dog including a rounded head, a spring engaging with the dog and disposed to swing the same to engage with the referred to member on the pin and to hold the pin out of cartridge-engag ing position, a rocker plate arranged for pivotal and longitudinal movement and contacting with one of the edges of the dog, and a turnable member having a lug engaging with one of the edges of the rocker plate and designed to actuate the said plate to swing the dog out of engagement with the referred to member of the pin. a

3. A look for the purpose set forth having a cartridge chamber, a spring pressed pin arranged adjacent to said chamber and designed to contact with a cartridge, to eX- plode the same when the said cartridge is arranged in the chamber, a member arranged angularly upon the pin, a pivoted dog for engaging with said member to hold the pin out of cartridge-engaging position, a rocker plate co-acting with the dog, a spring member engaging with the dog and with the rocker plate to swing the dog to engage with the referred to member upon the pin and to retain the rocker plate in engage ment with the dog, and a turnable member having a lug disposed to engage with one of the edges of the rocker plate and dc signed to actuate said plate to swing the dog out of engagement with the referred to member of the pin to permit of the latter exploding the cartridge.

Lessee? 4. A lock for the purpose set forth having a cartridge chamber, a spring pressed pin disposed adjacent to said chamber and designed to contact with a cartridge to explode the same when the said cartridge is arranged within the chamber, an angular member upon the pin, a spring pressed dog for engaging said member and to hold the pin out of cartridge contacting position, a rocker plate co-engaging with the dog, a turnable member having a lug engaging with one of the edges of the rocker plate and designed to actuate the said plate to swing the dog out of engagement with the referred to member on the pin, one of the side plates of the lock casing having an opening disposed longitudinally thereof and in a line with the referred to cartridge chamber, said angular member projecting through said opening, and a handle for the angular member.

5. A lock having a cartridge chamber upon the face plate thereof, a spring pressed pin disposed adjacent to the chamber and designed to explode a cartridge when the Copies of this patent may be obtained for five cents each, by addressing the latter is arranged in the chamber, an angular member upon the pin, a spring pressed dog for engaging with the said member to hold the pin out of cartridge-engaging posi tion, a rocker plate coacting with the dog, the spindle tumbler for the lock having a lug engaging with one of the edges of the rocker plate whereby to actuate the said plate to swing the dog out of engagement with the referred to member of the pin and to permit of the explosion of the cartridge, when the spindle is turned, one of the side plates of the lock casing being provided with an opening disposed adjacent to the cartridge chamber and whereby access may be obtained to the said cartridge chamber, a flange surrounding this opening, and a handle member engaging with the referred to angular member upon the pin for contacting with the outer edges of the referred to flange.

In testimony whereof I aflix my signature.

STEPHAN G. GERLACH.

Commissioner of Patents,

Washington, I). G. 

